Radioactive waste: what it is and how it is managed safely

The question that carries the most weight in any nuclear debate is not whether a plant generates electricity. It is what is done with what remains. The Nuclear Forum responds with an institutional and technical framework, not with a slogan: radioactive waste is, under Spanish law, any material or product of waste with no intended use that contains or is contaminated with radionuclides above the thresholds set by the competent ministry, following a report from the Nuclear Safety Council.

Not everything that “touches” a plant is high activity waste. Classification matters because it determines the storage, the timeline, and the cost. Unlike many industrial toxins, radiological hazard decreases over time. Each isotope has a half-life. Therefore, management does not consist of “making the material disappear,” but in isolating it for the necessary time until its activity drops to levels comparable to natural background or is permanently confined.

Where do they come from?

Not only from power plants. Also from hospitals, laboratories, industry, and decommissioning. Tools, filters, clothing, resins, sealed sources out of use, and, at the other end, irradiated fuel. In form, they can be solids, liquids, or gases. The legal objective of management is the same in all cases: to protect workers, the public, and the environment with current technologies and regulations.

How are they classified?

In European and Spanish practice, they are grouped mainly by activity, half-life, and consequently, by the destination facility.

• Very low, low, and medium activity: They are the vast majority (about 95% of the volume in Spain). They include materials for everyday operations and nuclear medicine. Their radioactivity substantially decreases over decades to about 300 years.
• High activity: They concentrate the remaining 5%. They have high levels of heat and initial radiotoxicity.

El Cabril: a benchmark for safety

El Cabril (Córdoba) is not a landfill. It is a surface storage facility with multiple barriers: drums, concrete containers, mortar, and cells. It has constant environmental radiological monitoring and supervision from organizations such as the CSN, the IAEA, and Euratom. Three decades of service support its operation without altering the environment.

The 5% debate: spent fuel

Spent fuel spends years in pools next to the reactor before going to a Temporary Individualized Storage (ATI). The Spanish plan bets on the Deep Geological Storage (AGP) as a long-term definitive solution, following the example of countries like Finland, Sweden, or France.

Who decides and who pays?

The Government approves the General Plan for Radioactive Waste and Enresa executes the management. Safety relies on engineering barriers, natural barriers, and the time factor.

Conclusion for Latin America

For the region, the message is clear: any nuclear energy project (SMR, Laguna Verde, Angra 3, or CAREM) requires a credible final disposal plan. With proper management, the waste ceases to be an unmanageable myth and becomes a measurable inventory with proven technology.

Radioactive waste is not improvised; it is classified, isolated, and monitored.

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Source: Nuclear Forum. Original article: https://www.foronuclear.org/actualidad/a-fondo/residuos-radiactivos-que-son-y-como-se-gestionan-de-forma-segura/Start writing here...